The WOW121 is a universal sound decoder for locomotives with DCC-ready 21-pin MTC connectors, and can also be used with any of TCS' motherboards. The WOW121 requires a motherboard to interface with the locomotive. The motherboard will determine the support for the number of lighting functions as well as the type supported (LED or 12V/1.5V bulbs). A WOW121 decoder will support up to 8 lighting functions.
 
Note: Function 5 and 6 are not programmable, and will only output constant bright lights. Take this into account when wiring multiple lighting functions.
 
Interface Type: Direct-Plug (21-Pin MTC)
Dimensions (L x W x H): 32.5mm x 17.5mm x 5.6mm
Scale: HO Scale
Continuous/Peak: 1.3/2.0 Amp
Total Functions: 8
Function Rating: 100 mA
12V Outputs: 8